Setup a Git repo for automated Git tests

For #6307 (closed) we need a Git repo with read-only access for some SSH key. This is the key whose public and private parts will be stored in the clear in Tails’ Git.

Related issues

Blocks #8670 (closed)

Original created by @anonym on 8644 (Redmine)

Edited Nov 22, 2019 by intrigeri

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information